#19652: Fix for #19524 introduced a backward compatiblity issue with related
managers on 1.5.X
-------------------------------------+-------------------------------------
     Reporter:  charettes            |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  ORM aggregation      |                  Version:
     Severity:  Release blocker      |  1.5-beta-1
     Keywords:  none EmptyQuerySet   |               Resolution:
  none                               |             Triage Stage:
    Has patch:  0                    |  Unreviewed
  Needs tests:  0                    |      Needs documentation:  0
Easy pickings:  0                    |  Patch needs improvement:  0
                                     |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by akaariai):

 The likely fix is to do queryset.filter(pk=None) instead of
 queryset.none(). User visible effect is the same as what is now done in
 master.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/19652#comment:2>
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